Sahih Bukhari
Characteristics of Prayer
Volume: 001 / Book Number: 012 / Hadith Number: 760
Narrated 'Aisha:
The Prophet used to say in his bowing and prostrations, "Subhanaka-Allahumma Rabbana wa-bihamdika Allahumma-ighfirli.' (I honor Allah from all what (unsuitable things) is ascribed to Him. O Allah Our Lord! And all the praises are for You. O Allah! Forgive me)."